October is one of the warmer months of the year in Dorchester, with average highs near 14.9°C and lows around 12.4°C (mean 13.7°C). It is a relatively wet time of year, averaging 101 mm of rainfall and 84% relative humidity across the period.
October is one of the warmer months of the year in Dorchester. Across 45 years of records, the warmest October in Dorchester was 2022 — when the month averaged 15.8°C — while the coldest was 1992 at 10.7°C. Typical October days reach 14.9°C with nights near 12.4°C. The long-term trend is warming, about 0.4°C per decade.
October is a relatively wet time of year in Dorchester, averaging 101 mm of rainfall. The wettest October on record was 2020 with 201 mm, while the driest was 1985 at 37 mm.
Relative humidity in Dorchester during October averages 84%. The most humid October was 2001 at 87%, and the least humid was 2003 at 80%.
October receives about 1.9 kWh/m²/day of solar energy in Dorchester. The sunniest Octobers were 2010, 2018 and 2022 at 2.2 kWh/m²/day, and the cloudiest were 1989, 1998 and 2000 at 1.6.
Average wind speed in Dorchester during October is 6.2 m/s. The windiest October was 1998 at 7.7 m/s, while the calmest was 2007 at 4.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.1°C | 13.2°C | 13.8°C | 13.8°C | 14.7°C | +1.6°C |
| Avg High | 14.4°C | 14.5°C | 15.1°C | 15.1°C | 15.9°C | +1.5°C |
| Avg Low | 11.8°C | 11.9°C | 12.6°C | 12.6°C | 13.5°C | +1.7°C |
| Avg Rain | 97 mm | 85 mm | 103 mm | 94 mm | 141 mm | +44 mm |
October temperatures in Dorchester have risen by about 2.2°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 4.5°C (2012) to a record high of 20.1°C (1997).
Rainfall in October is a relatively wet time of year, averaging 101 mm, with a wettest year of 201 mm.
A good time to visit Dorchester
October is a good time to visit Dorchester, with days averaging 14.9°C and nights around 12.4°C (mean 13.7°C, warmer than Dorchester's yearly average) and higher rainfall. August and July are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 15.5°C | 14.3°C | 13.1°C | 17.4°C | 9.5°C | 90 mm | 84% | 6.4 m/s | 1.8 |
| 2024 | 15.9°C | 14.7°C | 13.4°C | 17.2°C | 10.2°C | 114 mm | 85% | 5.3 m/s | 2 |
| 2023 | 16.4°C | 15.3°C | 14.3°C | 19.6°C | 10.2°C | 149 mm | 85% | 5.8 m/s | 2 |
| 2022 🔥 | 16.9°C | 15.8°C | 14.6°C | 18.3°C | 12.1°C | 114 mm | 84% | 6.1 m/s | 2.2 |
| 2021 | 16.1°C | 14.8°C | 13.5°C | 17.8°C | 11.1°C | 177 mm | 84% | 6.1 m/s | 2.1 |
| 2020 🌧️ | 14.4°C | 13.2°C | 12.1°C | 16.4°C | 9.2°C | 201 mm | 84% | 7.3 m/s | 1.8 |
| 2019 | 14.8°C | 13.6°C | 12.4°C | 17.3°C | 9.4°C | 170 mm | 83% | 6.5 m/s | 1.8 |
| 2018 | 15.1°C | 13.4°C | 11.7°C | 19.1°C | 6.3°C | 76 mm | 84% | 5.6 m/s | 2.2 |
| 2017 | 15.7°C | 14.4°C | 13.1°C | 18.1°C | 8.8°C | 62 mm | 85% | 6.1 m/s | 1.9 |
| 2016 | 14.7°C | 13.5°C | 12.3°C | 16.8°C | 9.7°C | 49 mm | 81% | 5.5 m/s | 2.1 |
| 2015 | 14.8°C | 13.4°C | 12.1°C | 17.0°C | 9.1°C | 53 mm | 83% | 5.5 m/s | 2 |
| 2014 | 16.0°C | 14.9°C | 13.8°C | 18.2°C | 11.1°C | 106 mm | 85% | 6.3 m/s | 1.9 |
| 2013 | 15.9°C | 14.7°C | 13.6°C | 18.2°C | 9.3°C | 139 mm | 86% | 6.9 m/s | 2 |
| 2012 | 14.1°C | 12.8°C | 11.4°C | 16.9°C | 4.5°C | 136 mm | 84% | 6.2 m/s | 1.8 |
| 2011 | 15.8°C | 14.6°C | 13.4°C | 18.4°C | 9.6°C | 56 mm | 84% | 6.2 m/s | 2 |
| 2010 | 14.5°C | 13.1°C | 11.7°C | 17.9°C | 7.1°C | 96 mm | 82% | 6.4 m/s | 2.2 |
| 2009 | 15.5°C | 14.3°C | 13.2°C | 17.7°C | 9.7°C | 81 mm | 83% | 5.2 m/s | 1.9 |
| 2008 | 13.9°C | 12.5°C | 11.2°C | 16.5°C | 5.3°C | 94 mm | 83% | 6.5 m/s | 2 |
| 2007 | 15.1°C | 13.9°C | 12.7°C | 17.1°C | 9.1°C | 44 mm | 82% | 4.7 m/s | 1.9 |
| 2006 | 16.5°C | 15.3°C | 14.1°C | 17.9°C | 10.7°C | 113 mm | 86% | 6.5 m/s | 1.8 |
| 2005 | 16.3°C | 15.2°C | 14.0°C | 18.0°C | 11.9°C | 118 mm | 86% | 6.2 m/s | 1.8 |
| 2004 | 14.3°C | 13.1°C | 11.9°C | 16.4°C | 9.5°C | 118 mm | 83% | 7.3 m/s | 1.8 |
| 2003 | 14.0°C | 12.5°C | 11.1°C | 18.2°C | 6.7°C | 83 mm | 80% | 6.6 m/s | 2 |
| 2002 | 15.0°C | 13.5°C | 12.0°C | 18.0°C | 8.0°C | 109 mm | 82% | 6.1 m/s | 1.8 |
| 2001 | 16.0°C | 15.1°C | 14.2°C | 17.8°C | 10.9°C | 116 mm | 87% | 6.6 m/s | 1.9 |
| 2000 | 14.2°C | 13.0°C | 11.8°C | 16.8°C | 9.1°C | 159 mm | 83% | 7.3 m/s | 1.6 |
| 1999 | 14.8°C | 13.6°C | 12.4°C | 17.2°C | 9.5°C | 74 mm | 82% | 6.4 m/s | 2 |
| 1998 | 14.8°C | 13.2°C | 11.7°C | 17.1°C | 8.7°C | 127 mm | 83% | 7.7 m/s | 1.6 |
| 1997 | 15.4°C | 14.0°C | 12.6°C | 20.1°C | 9.0°C | 80 mm | 82% | 6.1 m/s | 2 |
| 1996 | 15.3°C | 13.9°C | 12.6°C | 17.6°C | 10.3°C | 80 mm | 83% | 6.6 m/s | 1.9 |
| 1995 | 16.2°C | 15.0°C | 13.9°C | 18.2°C | 11.3°C | 54 mm | 85% | 5.6 m/s | 1.9 |
| 1994 | 14.6°C | 13.3°C | 12.0°C | 17.2°C | 7.7°C | 105 mm | 82% | 5.9 m/s | 2.1 |
| 1993 | 12.6°C | 11.1°C | 9.7°C | 15.7°C | 5.6°C | 91 mm | 83% | 6.6 m/s | 1.9 |
| 1992 ❄️ | 12.1°C | 10.7°C | 9.2°C | 16.2°C | 5.7°C | 76 mm | 82% | 6.8 m/s | 1.9 |
| 1991 | 13.9°C | 12.7°C | 11.5°C | 17.4°C | 7.1°C | 89 mm | 82% | 5.7 m/s | 1.7 |
| 1990 | 15.4°C | 14.2°C | 12.9°C | 18.5°C | 8.9°C | 76 mm | 83% | 6.5 m/s | 1.8 |
| 1989 | 16.0°C | 14.6°C | 13.3°C | 17.5°C | 11.2°C | 81 mm | 82% | 6.4 m/s | 1.6 |
| 1988 | 14.5°C | 13.3°C | 12.1°C | 16.8°C | 7.9°C | 97 mm | 85% | 6.2 m/s | 1.9 |
| 1987 | 14.0°C | 12.9°C | 11.7°C | 17.4°C | 8.6°C | 147 mm | 83% | 6.1 m/s | 1.7 |
| 1986 | 14.9°C | 13.4°C | 11.9°C | 16.9°C | 7.9°C | 96 mm | 86% | 5.8 m/s | 1.8 |
| 1985 | 14.5°C | 13.2°C | 11.9°C | 17.7°C | 7.0°C | 37 mm | 85% | 5.4 m/s | 1.8 |
| 1984 | 14.7°C | 13.5°C | 12.3°C | 17.0°C | 9.8°C | 84 mm | 84% | 6.3 m/s | 1.7 |
| 1983 | 14.2°C | 12.8°C | 11.5°C | 17.5°C | 5.9°C | 64 mm | 82% | 6.7 m/s | — |
| 1982 | 14.2°C | 12.9°C | 11.7°C | 16.2°C | 10.0°C | 150 mm | 84% | 5.7 m/s | — |
| 1981 | 12.8°C | 11.4°C | 9.9°C | 16.3°C | 6.7°C | 119 mm | 82% | 6.9 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 14.9°C with lows near 12.4°C (mean 13.7°C), based on 45 years of NASA POWER data.
October averages 101 mm of rainfall in Dorchester, a relatively wet time of year. The wettest on record was 201 mm in 2020.
The hottest October reached 20.1°C in 1997. The coldest dipped to 4.5°C in 2012.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 2.2°C. Daytime highs moved from 14.1°C to 16.2°C and overnight lows from 11.5°C to 13.8°C over the same span.
October is one of the warmer months of the year in Dorchester and a relatively wet time of year, so plan for around 14.9°C daytime highs and 12.4°C at night.
Not quite — October is the 8th coolest month in Dorchester, averaging 13.7°C.
For October in Dorchester, pack light layers you can adjust through the day, with typical highs of 14.9°C and lows of 12.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 84% — quite humid.
Average wind speed in October is 6.2 m/s. The windiest October on record averaged 7.7 m/s (1998).
The wettest October on record was 2020 with 201 mm. On average, October sees 101 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Dorchester behaves each October, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for October specifically, along with year-by-year records and how the month has changed over the decades.
